74hc164 shift register

74HC164 is a CMOS Level 8-Bit, two Serial inputs based and Parallel output Shift register that can be used to increase the output pins of the microcontroller unit. The specification can be found on the part number itself where 74 is derived from the 7400 logic family and the HC stands for the High-Speed CMOS operation.

Since it is 8-bit, it has 8 output pins which can be assumed as 8 output pins of any microcontroller unit. Thus, it can asynchronously have data serially in its input pins microcontrollers and provide output on 8 different output pins which can be further connected to Transistor switches, LEDs, or in other input pins of sensor or parallel interfaces.

Features and specification of 74HC164

• 8-bit, Parallel Out – Serial Input Shift register
• Operating Voltage: 2V to 6V
• Current Consumption: 100uA (max)
• Output current Source: ±25mA
• Input and Output Voltage is equal to Operating voltage (Can be 0 and VCC)
• Minimum high-level Output Voltage: 4.4V @(Vcc=4.5V)
• Maximum low-level Output Voltage: 0.1V @(Vcc=4.5V)
• Maximum Clock Frequency: 54Mhz @4.5V
• Available in 14-pin PDIP, FK, SSOP, CDIP, SOIC packages

datasheet :74hc164